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Preparation of bifluorenes via the synthesis and thermal decomposition of fluorenyltitanium(IV) trichlorides. Molecular and crystal structure of 9,9′-bis(trimethylsilyl)-bi-9,9′-fluorene

✍ Scribed by Sergei Ya. Knjazhanski; Guillermo Moreno; Gregorio Cadenas; Vitalii K. Belsky; Boris M. Bulychev

Publisher
Elsevier Science
Year
1999
Tongue
French
Weight
416 KB
Volume
55
Category
Article
ISSN
0040-4020

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✦ Synopsis

The reaction of 9-substituted trimethyltinfluorenes with TiCI4 in hexanes at -40°C leads to unstable fluorenyltitanium(IV) trichlorides which thermal radical decomposition gives quantitatively TiCl3 and corresponding bifluorenes: (CI3H9)2 (3a), (9-EtCt3Hs)2 (3b) and (9-SiMe3CI3Hs)2 (3e). Crystals of 3c are monoclinic (space group P 2/n), a = 15.059 A, b = 10.254 A, c = 18.172 A, 13 = 109.20 deg. IIIc dissociates at 100°C to give two radicals which initiate effectively radical polymerizations of methyl methacrylate and styrene,

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